当前位置: 首页 > 文章 > 高密度CO_2对凡纳滨对虾肌球蛋白疏水性的影响 广东海洋大学学报 2016 (1) 73-78
Position: Home > Articles > Effect of Dense Phase Carbon Dioxide on Hydrophobicity of Myosin Proteins from Litopenaeus vannamei Journal of Guangdong Ocean University 2016 (1) 73-78

高密度CO_2对凡纳滨对虾肌球蛋白疏水性的影响

作  者:
郭明慧;邓倩琳;刘书成;邓楚津;吉宏武;李承勇;高静
单  位:
广东海洋大学食品科技学院//广东省水产品加工与安全重点实验室//广东普通高等学校水产品深加工重点实验室
关键词:
高密度CO2;肌球蛋白;表面疏水性;酪氨酸
摘  要:
为揭示高密度CO2(Dense Phase Carbon Dioxide,DPCD)诱导肌球蛋白形成凝胶的机制,利用ANS探针法和荧光法,分别测定在压力5~30 MPa、温度50~70℃、时间10~50 min等不同处理条件下肌球蛋白表面疏水性和酪氨酸内源荧光值,探讨DPCD对凡纳滨对虾肌球蛋白高级结构的影响。研究表明:与未处理的肌球蛋白相比,DPCD处理能使肌球蛋白的表面疏水性和酪氨酸内源荧光值显著增加(P<0.05);在相同温度下,DPCD处理的肌球蛋白的表面疏水性和酪氨酸内源荧光值显著高于水浴热处理的(P<0.05);DPCD处理压力、温度升高以及时间延长,均能使肌球蛋白的表面疏水性和酪氨酸内源荧光值显著增加(P<0.05)。DPCD能够诱导肌球蛋白疏水基团暴露,使紧密的高级结构发生松散。
译  名:
Effect of Dense Phase Carbon Dioxide on Hydrophobicity of Myosin Proteins from Litopenaeus vannamei
作  者:
GUO Ming-hui;DENG Qian-lin;LIU Shu-cheng;DENG Chu-jin;JI Hong-wu;LI Cheng-yong;GAO Jing;College of Food Science and Technology,Guangdong Ocean University,Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety,Key Laboratory of Advanced Processing of Aquatic Product of Guangdong Higher Education Institution;
关键词:
Dense phase carbon dioxide;;myosin;;surface hydrophobicity;;tyrosine
摘  要:
This study investigated the effect of dense phase carbon dioxide(DPCD) on myosin gel formation induced by measuring the surface hydrophobicity and tyrosine intrinsic fluorescence spectrum of myosin in different conditions(pressure 5~30 MPa, temperature 50~70 ℃, time 10~50 min) with ANS probe and fluorescence scanning, respectively. The results indicated that DPCD treatment increased the surface hydrophobicity and the intrinsic fluorescence value of tyrosine significantly(P<0.05). Under the same temperature, the surface hydrophobicity and the intrinsic fluorescence value of tyrosine of myosin treated by DPCD were significantly higher than those of water bath heat-treatment(P<0.05). DPCD significantly enhanced the surface hydrophobicity and the intrinsic fluorescence value of myosin tyrosine with the increased pressure and temperature and the extension of time(P<0.05). These findings showed that DPCD could expose the hydrophobic group of myosin, which could loose the tight advanced structure.

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